Elementos

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Across
  1. 2. The smallest unit of matter.
  2. 3. each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
  3. 5. a group is a column of elements in the periodic table of the chemical elements.
  4. 8. Reaction A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
  5. 10. cloud the system of electrons surrounding the nucleus of an atom.
Down
  1. 1. Anything that has mass and takes up space.
  2. 4. The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
  3. 6. Ability to react with other elements.
  4. 7. A small particle with a negative charge that is found in all atoms.
  5. 9. Neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen